tofsee | f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b

General

Target

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
Size

116KB
MD5

4ee3012b6de81e70ea3aeb1c8b63bde1
SHA1

11adf906465c1f81d157d068632c8a88acd676b2
SHA256

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b
SHA512

0d618c0b8920eb684e09a9edacbbf680e6cc5b21a17f1a37c3ade0e0822b1421aa289c500a4db5c4ed4164f0844a91b76fe3ffc705379657ba97b074f73c3b27
SSDEEP

1536:7Jcg21s3VMp5fjgQpnFGQGbDjNQo066KE8oLEFTEcK3b:qgIpWQVFobvNTh6soHcKr

Score

10^/10

tofsee persistence trojan

Malware Config

Extracted

Family

tofsee

C2

103.9.150.244

188.190.120.102

121.127.250.203

188.165.132.183

rgtryhbgddtyh.biz

wertdghbyrukl.ch

Signatures

Tofsee
Backdoor/botnet which carries out malicious activities based on commands from a C2 server.
trojan tofsee
Executes dropped EXE 2 IoCs

Processes:

abtrrldq.exeabtrrldq.exe

pid process

1340 abtrrldq.exe
2504 abtrrldq.exe

pid	process
1340	abtrrldq.exe
2504	abtrrldq.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\Control Panel\International\Geo\Nation	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe

description	ioc	process
Set value (str)	\REGISTRY\USER\S-1-5-21-929662420-1054238289-2961194603-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\MSConfig = "\"C:\\Users\\Admin\\abtrrldq.exe\""	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exeabtrrldq.exeabtrrldq.exe

description	pid	process	target process
PID 2912 set thread context of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 1340 set thread context of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 2504 set thread context of 3820	2504	abtrrldq.exe	svchost.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

System Information Discovery
T1082
Program crash 1 IoCs

Processes:

WerFault.exe

pid pid_target process target process

5036 3820 WerFault.exe svchost.exe
Suspicious use of SetWindowsHookEx 2 IoCs

Processes:

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exeabtrrldq.exe

pid process

2912 f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
1340 abtrrldq.exe

pid	pid_target	process	target process
5036	3820	WerFault.exe	svchost.exe

pid	process
2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
1340	abtrrldq.exe

Suspicious use of WriteProcessMemory 29 IoCs

Processes:

f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exef0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exeabtrrldq.exeabtrrldq.exe

description	pid	process	target process
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 2912 wrote to memory of 3356	2912	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
PID 3356 wrote to memory of 1340	3356	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	abtrrldq.exe
PID 3356 wrote to memory of 1340	3356	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	abtrrldq.exe
PID 3356 wrote to memory of 1340	3356	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	abtrrldq.exe
PID 3356 wrote to memory of 1080	3356	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	cmd.exe
PID 3356 wrote to memory of 1080	3356	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	cmd.exe
PID 3356 wrote to memory of 1080	3356	f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe	cmd.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 1340 wrote to memory of 2504	1340	abtrrldq.exe	abtrrldq.exe
PID 2504 wrote to memory of 3820	2504	abtrrldq.exe	svchost.exe
PID 2504 wrote to memory of 3820	2504	abtrrldq.exe	svchost.exe
PID 2504 wrote to memory of 3820	2504	abtrrldq.exe	svchost.exe
PID 2504 wrote to memory of 3820	2504	abtrrldq.exe	svchost.exe
PID 2504 wrote to memory of 3820	2504	abtrrldq.exe	svchost.exe

C:\Users\Admin\AppData\Local\Temp\f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
"C:\Users\Admin\AppData\Local\Temp\f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe"
1⤵
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:2912

C:\Users\Admin\AppData\Local\Temp\f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe
"C:\Users\Admin\AppData\Local\Temp\f0442b8d5ee23b6a85a2f5543035a761a096df9d249dbb0944f9686ede04f59b.exe"
2⤵
- Checks computer location settings
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
PID:3356

C:\Users\Admin\abtrrldq.exe
"C:\Users\Admin\abtrrldq.exe"
3⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:1340

C:\Users\Admin\abtrrldq.exe
"C:\Users\Admin\abtrrldq.exe"
4⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:2504

C:\Windows\SysWOW64\cmd.exe
C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\2385.bat" "
3⤵
PID:1080

C:\Windows\SysWOW64\svchost.exe
svchost.exe
1⤵
PID:3820

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -u -p 3820 -s 356
2⤵
- Program crash
PID:5036

C:\Windows\SysWOW64\WerFault.exe
C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 3820 -ip 3820
1⤵
PID:2832

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

1

T1060

Privilege Escalation

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

1

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\2385.bat
Filesize
302B

MD5
41394150cc0df28b0cbe851a6daa6671

SHA1
d05463e2aef296ee59324505ed4ed8a0aaa729f8

SHA256
850ace68451b04e3c3abdc2b900b7e9cb0b452290bfe519cf6ad209d11f5e76a

SHA512
1ef1d5759678bf9318f69cc3773f2e0df695b76238134acddf1f70361544ed2c5195acdae18c5f602b1e60a239a6fe0820e2bcabfc2257ad3e6d05708bf8ce48

Download Submit
C:\Users\Admin\abtrrldq.exe
Filesize
44.2MB

MD5
a68458bdaa0bbd886e191599a91f6193

SHA1
a3aff1af2a3b122a8fba25dd0dc50a36ea65e12b

SHA256
619fee028cae90b6d5ebb1cc7c7488b183ce4801822dba125da0c9dbfde8ba0a

SHA512
f6d23e51216023a9ea7c6256b64f52b84d2f40d5c3b7e399190dfaf8cf5e544873b8971358eb08e8a8c8ef321aef6e756ac41bd6797a89ce72c3dec3b1e023f0

Download Submit
C:\Users\Admin\abtrrldq.exe
Filesize
44.2MB

MD5
a68458bdaa0bbd886e191599a91f6193

SHA1
a3aff1af2a3b122a8fba25dd0dc50a36ea65e12b

SHA256
619fee028cae90b6d5ebb1cc7c7488b183ce4801822dba125da0c9dbfde8ba0a

SHA512
f6d23e51216023a9ea7c6256b64f52b84d2f40d5c3b7e399190dfaf8cf5e544873b8971358eb08e8a8c8ef321aef6e756ac41bd6797a89ce72c3dec3b1e023f0

Download Submit
C:\Users\Admin\abtrrldq.exe
Filesize
44.2MB

MD5
a68458bdaa0bbd886e191599a91f6193

SHA1
a3aff1af2a3b122a8fba25dd0dc50a36ea65e12b

SHA256
619fee028cae90b6d5ebb1cc7c7488b183ce4801822dba125da0c9dbfde8ba0a

SHA512
f6d23e51216023a9ea7c6256b64f52b84d2f40d5c3b7e399190dfaf8cf5e544873b8971358eb08e8a8c8ef321aef6e756ac41bd6797a89ce72c3dec3b1e023f0

Download Submit
memory/1080-144-0x0000000000000000-mapping.dmp

Download
memory/1340-139-0x0000000000000000-mapping.dmp

Download
memory/2504-156-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2504-151-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/2504-147-0x0000000000000000-mapping.dmp

Download
memory/3356-145-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3356-135-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3356-138-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3356-137-0x0000000000400000-0x0000000000412000-memory.dmp

Filesize
72KB

Download
memory/3356-134-0x0000000000000000-mapping.dmp

Download
memory/3820-153-0x0000000000710000-0x0000000000722000-memory.dmp

Filesize
72KB

Download
memory/3820-152-0x0000000000000000-mapping.dmp

Download
memory/3820-157-0x0000000000710000-0x0000000000722000-memory.dmp

Filesize
72KB

Download
memory/3820-158-0x0000000000710000-0x0000000000722000-memory.dmp

Filesize
72KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads